Tenoning and mortising machine



'UNITED sTATEs PATENT OFFICE.

ELBRIDGE LYMAN, 0F NORTHFIELD, MASSACHUSETTS.

TENONING AND MORTISING MACHINE.

Specicaton of Letters Patent No. 3,602, dated May 25, 1844:.

To all whom t may concern.'

Be it known that I, ELBRIDGE LYMAN, ofA

chinery for Mortising and Tenoning, and

that the following description and accomi panying drawing taken togetherconstitute a full and exact specification of the construe tion andoperation of the same. y

Figure l of the drawings above mentioned represents a front view of theupper part of the machine. Fig. 2 is a side view of the movable. andreversible cutter holder and upper part of the depresser to which it isattached. Fig. 3 is a top view of the said holder. A

A (Figs. l and 2) is the depresser to which the mortising chisel isusually attached, and which is operated by the foolu applied upon atradle connected to it, as 1n other machines for mortising.

B is what I term the movable and reversible head, which carries themortising chisel C and the two chisels D, D, by which a tenon may beformed.

E is the shelf or support piece, which sustains the piece of wood to beoperated on.

The movable head B is confined to the top of the depresser A by screws(as denoted by dotted lines at a, a, Fig. 2), projecting` verticallyfrom the top of the depresser and passing through holes formed throughthe head, and having nuts I), b, which, when placed upon them and turneddown, confine the head B to the depresser. On removing the nuts the headmay be readily reversed so as to b-ring the tenoning chisels in front ofthe depresser A and over the shelf E. The two tenoning chisels D, D.have their shanks c, c, (Figs. 2 and 3) passed. through an elongatedslot cl, Fig. 3, formed vertically through the head B, and the saidchisels are confined in the said slot by means of shoul ders at e, e,(which abut against the undersideof the head) and Wedge pins f, f,passed through the upper parts of their Shanks; or Y they may beconfined therein by any other proper method. By arranging them in avertical slot their proper distance asunder may be regulated atpleasure.

. The chisel C has its shank, or part or socket, through which the shankpasses, arranged within a similar elongated slot g formedverticallyrthrough the head B as seen in Fig. 3; the object of the samebeing to allow the chisel to be set nearer to or farther from the frontface of the depresser A, in order to bring it into the right `positionupon the piece of wood to be mortised. The shank of the chisel iscylindrical and passes through a corresponding cylindrical hole boredthrough a socketz' (represented in Fig. 4 as detached from the head B),which has a head 7c upon its lower end, and is passed upward through andmoves in the slot g. A nut Zis screwed upon the top of the screw andupon a washer m and thus confines the chisel at any desirable distancefrom the front of the depresser. The arms of the nut have their endsturned upward and a. notch formed in each as see-n at o, Fig. 3.` Aspring lever y? iXed upon the top of the shank of the chisel serves toturn the chisel around `one hundred and eighty degrees or to reverse itsedge. On placing the spring lever in one of the notches 0 it confinesthe chisel in the position required.

All the remaining parts of the machinery are similar to those in use inthis description of mortising machines.

Having thus concluded my description I shall claim- Arranging the tw'osets of chisels (tenoning and mortising) upon one movable and reversiblehead B (as represented in Fig. 2)

instead of disposing them upon s-eparate heads in the usual manner.

In testimony that the above is a correct specification, I have heretoset my signature.

ELBRIDGE LYMAN. Vitnesses CALEB EDDY,

R. H. EDDY.

